The regular expressions in Package::_parseManifest fail to identify the target web if non-standard files are installed into a data/Web directory.

The issue was exposed by TopicClassificationAddOn - which installed a changes and webnotify file into the web. These should be omitted from the manifest, but Package installer should be more robust and not fail if invalid files are installed into the web.

Initial fix will be to bypass illegal files with an error message to STDERR. Will evaluate a more complete solution.

Pass back a warning and bypass any lines in the manifest. data needs to identify a valid Web and Topic.txt file. pub should identify a web, topic and attachment. If these components are missing the file will be bypassed during installation and a warning returned in the results.